Inside this generations-old (and owned) book bindery and paper printing shop, everything was covered in printed paper. The shop was also the studio and I was pleased to be able to see the owner at work while we browsed. It was a wonderful place with a lot of character, away from the major tourist streets. I will share the exact name once I track down their business card (it's in my luggage somewhere).
[Update 11-20-2007] If you find yourself in Venice, the shop is Legatoria Polliero, Campo dei Frari, San Polo 2995, Venice. Phone: 041/5285130